SMB-142 – ZF AVN-132 Center Axle Caliper Carrier Bolt Removal – New Flyer Xcelsior

SEOCONTENT-START
SMB-142 1 of 2
SERVICE MANUAL BULLETIN
This Service Manual Bulletin is prepared by the Publications Department of New Flyer Industries
Canada ULC. Refer to details below.
The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2015 New Flyer Industries Canada ULC
ISSUE DATE: Apr 08 2015
SMB-142
APPLICABILITY
VEHICLE LENGTH  30ft.  35ft.  40ft.  60ft.  ALL
VEHICLE TYPE  High Floor  Low Floor  Invero  Xcelsior®  ALL
FUEL TYPE
 Diesel  Electric  CNG  LNG
 ALL
 Diesel/Electric  Gas/Electric  Fuel Cell
SUBJECT ZF AVN-132 Center Axle Caliper Carrier Bolt Removal
SECTION TITLE 2 – REAR & CENTER AXLE & SUSPENSION
DETAILS This bulletin provides OEM revised information on the removal of the caliper
carrier bolts on the ZF AVN-132 center axle assembly of your New
Flyer Vehicle.
This information supersedes any prior information on this subject already
provided in your New Flyer Service Manuals. Make this Service Bulletin
available to service personnel to inform them of changed information.
2 of 2 SMB-142
SERVICE MANUAL BULLETIN
SMB-142
The New Flyer vehicles described in this manual may be protected by one or more
patents and design applications or registrations in the United States and Canada,
and in other countries. Refer to “Vehicle Patent Information” in this manual.
Copyright © 2015 New Flyer Industries Canada ULC
1. Caliper Carrier
1.1. Caliper Carrier Bolt Removal
Refer to “Rear Brake System”, “Brake Caliper
& Carrier Assembly” for servicing in
your New Flyer Service Manual and proceed
as follows:
When servicing the ZF AVN-132 center
axle caliper carrier, the M16 Hex head bolt
located at the center in the caliper carrier
cannot be fully removed as it will come into
contact with the upper radius rod retaining
bracket. See “Fig. 1: Caliper Carrier
Retaining Bolt” on page 2.
The axle OEM has approved the reuse of
this one bolt if, upon inspection, it is determined
not to exhibit signs of stress, corrosion,
damage or deformity.
☞NOTE:
All other remaining bolts must be replaced
with new as outlined in your New Flyer
Service Manual.
Upon inspection, if it is determined that the
bolt cannot be reused, it will be necessary
to remove the radius rod bracket to facilitate
replacement of the damaged bolt.
Fig. 1: Caliper Carrier Retaining Bolt
2. Radius Rod
2.1. Radius Rod Bracket Removal
Ensure that the axle is supported to
prevent shifting.
1. Remove the two M18 bolts that retain the
radius rod to the bracket adjacent to the
caliper carrier bolt noting the spacer and
washer locations and quantity.
2. Remove the opposite two M18 bolts that
retain the radius rod to the frame noting
the spacer and washer locations and
quantity.
3. Remove the radius rod from the vehicle.
DO NOT attempt to remove more than
one radius rod at a time. Removing two
or more radius rods will cause the axle
to become unstable.
4. Remove the two M18 cap screws and
washers retaining the radius rod bracket to
the axle.
5. Remove the radius rod bracket to facilitate
removal of the M16 caliper carrier bolt.
6. Remove the M16 caliper carrier bolt
2.2. Radius Rod Bracket Installation
1. Replace the M16 caliper carrier bolt with a
new one.
2. Inspect the two M18 cap screws and washers
that were removed from the radius rod
bracket. If upon inspection, it is determined
that these bolts and washers cannot be
reused, replace with new.
3. Install the radius rod bracket and torque
the two M18 cap screws to 325 ft-lb. (440
Nm).
4. Install the radius rod in its original location
and orientation. Refer to “Center Suspension”,
“Center Radius Rods” in your New
Flyer Service Manual for procedure.
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